Abstract
In this paper, the accuracy of the market information which is stored in NAPASS (Nation-wide Agricultural products Price Analysis Support System) is evaluated using the detailed account information of pear products of an agricultural cooperatives branch in Toyama prefecture. The daily market information of six markets from 1988 to 1990 (August and September) are compared with the detailed account information and the relations are analyzed.
The results indicate that the daily quantity of market information is almost same to corresponding quantity of the detailed account information in four markets through the analyzed period. On the other hand, the daily price of market information is almost same to corresponding price of the detailed account information in two markets. In the other markets, the major types of relations between market information and the detailed account information are categorized as follows: (1) price of the market information is almost same to the price of the detailed account information in certain standard (quality and size) in a given market and month, (2) the former is likely same to the latter, (3) the relations between the former and the latter are not clear. However, at least the patterns of daily movements of the former and the latter are almost same.
The above results imply that users of market information (or NAPASS) should recognize the characteristics of the daily market information. Then the market information is useful in researches on price and quantity movements, supply response, and so on.
